function init() {
    //email检验置空
    document.getElementById("email").addEventListener("focus", () => {
        document.querySelector(".email_error_msg").innerHTML = "";
        document.querySelector(".email_error_img").classList.remove("errorImg");
        document.querySelector(".email_error_msg").classList.remove("errorMessage");
        document.querySelector(".email_error_msg").classList.remove("okMessage");
        document.querySelector(".email_error_img").classList.remove("okImg");
    }, false);
    //email检验
    document.getElementById("email").addEventListener("blur", () => {
        let regExp = /^[a-zA-Z0-9_.-]+@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.[a-zA-Z0-9]{2,6}$/;
        if (!regExp.test(document.getElementById("email").value)) {
            document.querySelector(".email_error_msg").innerHTML = "邮箱格式不正确！";
            document.querySelector(".email_error_msg").classList.add("errorMessage");
            document.querySelector(".email_error_img").classList.add("errorImg");
        } else {
            document.querySelector(".email_error_msg").innerHTML = "邮箱格式符合要求！";
            document.querySelector(".email_error_msg").classList.add("okMessage");
            document.querySelector(".email_error_img").classList.add("okImg");

        }
    }, false);
}
window.addEventListener("load", init, false);